 TA Category  Number in sample  MS category mean score  MS category score SD   Df  Significance  Mean difference 
 Several times per day  172  87.98  10.04  15.97  171  0.001  12.22  Once or twice per day  98  85.35  10.46  9.07  97  0.001  9.59  Once or twice per week  38  81.05  12.04  2.71  37  0.010  5.30  Once or twice per month  13  74.46  22.30  −0.21  12  0.838  −1.29  Less than once per month  13  71.69  21.45  −0.68  12  0.508  −4.06 

